Next, let’s mix our ingredients together. [Add each ingredient to the bowl as you mention it.] You’ll use an entire one-pound box of powdered sugar. Pour that into the bowl. You might want to help the kids out here, as this ingredient can get a little messy. To the sugar, add ⅔ cup of cocoa and ¼ teaspoon salt. Combine those. [Stir.] Next come the liquid ingredients: ¼ cup of milk and 2 teaspoons of vanilla. [Add these items and stir.] Once these are all combined, the only ingredient left to add is the butter. Have your child place the entire stick of butter on top of the other ingredients. [Do this.] Put the bowl in the microwave and let it heat for two minutes. No peeking!